What is the value of the expression shown when n = 6?
1 answer:
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Answer:
b. The values X and Y are independent therefore, the mean is 34 seconds and the standard deviation is 50 seconds
Step-by-step explanation:
Subtraction between normal variables:
When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.
Before the training, the mean running time for the students to run a mile was 402 seconds with standard deviation 40 seconds.
This means that
After completing the program, the mean running time for the students to run a mile was 368 seconds with standard deviation 30 seconds.
This means that
Which of the following is true about the distribution of X-Y?
They are independent, so:
This means that the correct answer is given by option b.
Answer:
The quick ratio is 4.75:1.
Step-by-step explanation:
From the given information it is clear that:
Cash = $340,000
Inventory = $280,000
Accounts receivable = $40,000
Accounts payable = $65000
Other current liabilities = $15000
Formula for quick ratio:
Substitute Cash = 340000, Current receivables=40000, Current Liabilities= (65000+15000).
Therefore the quick ratio is 4.75:1.